JEE Main 2019 Chemistry question
The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are:
Answer: (D)
Solution
Phosphorus: group 15, 3s3p.
The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are:
Phosphorus: group 15, 3s3p.